sstate.bbclass: remove dependencies of SSTATE_EXTRAPATHWILDCARD

sstate.bbclass: remove dependencies of SSTATE_EXTRAPATHWILDCARD

There might be do_cleansstate errors sometimes:
ERROR: When reparsing
/path/to/meta/recipes-devtools/quilt/quilt-native_0.65.bb.do_cleansstate,
the basehash value changed from
b4dbcb956a32ed4c3f58b7971717907bfc03bb21f3b140fa97f7765ee695f4d0 to
c8307418a671686349b73efbd51c5c82c897a88707a759ddb22fd95baa5df2ba. The metadata
is not deterministic and this needs to be fixed.

The stable reproducer is:
- Initial a fresh build, this is a must, otherwise we may can't reproduce it
  $ . oe-init-build-env build
  $ bitbake quilt-native -ccleansstate

This is because uninative.bbclass resets NATIVELSBSTRING from distro (e.g.,
ubuntu) to universal, remove dependencies of SSTATE_EXTRAPATHWILDCARD as
SSTATE_EXTRAPATH did can fix the problem.

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>